wifi: rtw89: regd: block 6 GHz by policy if not specific country

We allow 6 GHz on target regd if and only if
  1. it is a specific country, i.e. not any world-wide cases
  2. its 6 GHz is not blocked

So, for world-wide cases, their 6 GHz will be blocked now.
Signed-off-by: Zong-Zhe Yang <kevin_yang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://msgid.link/20240412115729.8316-6-pkshih@realtek.com

drivers/net/wireless/realtek/rtw89/regd.c

@@ -572,10 +572,8 @@ static void rtw89_regd_apply_policy_6ghz(struct rtw89_dev *rtwdev,
 	int i;
 
 	index = rtw89_regd_get_index(regd);
-	if (index == RTW89_REGD_MAX_COUNTRY_NUM)
-		return;
-
-	if (!test_bit(index, regulatory->block_6ghz))
+	if (index != RTW89_REGD_MAX_COUNTRY_NUM &&
+	    !test_bit(index, regulatory->block_6ghz))
 		return;
 
 	rtw89_debug(rtwdev, RTW89_DBG_REGD, "%c%c 6 GHz is blocked by policy\n",